In D.C. machines the width of the duct is usually_____________?
Correct answer: D. 10 mm
- A. 4 mm
- B. 6 mm
- C. 8 mm
- D. 10 mm
Explanation
Ventilation ducts in DC machines are commonly assigned a width of about 10 mm. This provides an air passage without unnecessarily weakening the magnetic core or armature structure.
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